Staggered arched walls, tower defences and roped cortaldi guns

Staggered arches to resist bombards

Arches within the wall's thickness are to be interchanged so they do not all spring from one pier but from different ones. Thus if bombards break one pier, the arches above will not collapse. A note adds the aim: to close off a valley.

Two linked towers with underground passage

A plan shows two solid, merlon-less towers marked 'solid, solid'. The tunnel running from one fortress to the other is set inside the wall that passes underground.

The castellan's private portcullis 'a'

A round tower is sectioned to show a portcullis labelled a. It is under the sole control of the castellan, whose own room lets him drive the garrison soldiers out of every part.

Roped cortaldi hidden by a curtain, fired in pairs

A row of cortaldi is fastened with new wet ropes and chains to their shot and screened by a curtain. When the enemy charges, the curtain drops and the guns are fired two at a time to unhorse many men and throw the following riders into confusion.

Wall left uncovered against water damage

At the top of a building a gallery sits on a sloping floor. The note gives a way to leave a wall uncovered without letting water damage it.

Due schizzi di mura turrite con archi sovrapposti, con:

Pianta di due torri collegate, con:

Torre, con:

Sezione di torre rotonda, con:

Schizzi di torri quadrangolari, con:

Al sommo d'un edificio galleria su pavimento inclinato, con:

Cortaldi legati con corde e celati da una tenda, con:

Piccola figura di tre cortaldi.

Di fianco alla figura maggiore dei cortald:

Two sketches of turreted walls with superimposed arches, with:

Plan of two linked towers, with:

Tower, with:

Section of a round tower, with:

Sketches of quadrangular towers, with:

At the top of a building, a gallery on an inclined floor, with:

Cortaldi tied with ropes and hidden by a curtain, with:

Small figure of three cortaldi.

Beside the larger figure of the cortaldi: